Somaesthetic perception of the vertical in spinal cord injured patients: A clinical study

Joassin, R.; Bonniaud, V.; Barra, Julien; Marquer, A.; Pérennou, Dominic

doi:10.1016/j.rehab.2010.07.005

Cited by 17 publications

(18 citation statements)

References 23 publications

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“…found no significant effects of complete thoracic spinal cord injuries on orientation of subjective visual vertical. 12 Barra et al . also found that verticality estimates in subjective visual vertical tests were not different for paraplegic patients versus normal controls.…”

Section: Resultsmentioning

confidence: 99%

Idiopathic scoliosis and the vestibular system

2014

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Purpose Despite its high prevalence, the etiology underlying idiopathic scoliosis remains unclear. Although initial scrutiny has focused on genetic, biochemical, biomechanical, nutritional and congenital causes, there is growing evidence that aberrations in the vestibular system may play a role in the etiology of scoliosis. In this article, we discuss putative mechanisms for adolescent idiopathic scoliosis and review the current evidence supporting a role for the vestibular system in adolescent idiopathic scoliosis. Methods A comprehensive search of the English literature was performed using PubMed (http://www.ncbi.nlm.nih.gov/pubmed). Research articles studying interactions between adolescent idiopathic scoliosis and the vestibular system were selected and evaluated for inclusion in a literature review. Results Eighteen manuscripts of level 3-4 clinical evidence to support an association between AIS and dysfunction of the vestibular system. These studies include data from physiologic and morphologic studies in humans. Clinical data are supported by animal model studies to suggest a causative link between the vestibular system and AIS. Conclusions Clinical data and a limited number of animal model studies suggest a causative role of the vestibular system in AIS, although this association has not been reproduced in all studies.

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Section: Resultsmentioning

confidence: 99%

Idiopathic scoliosis and the vestibular system

2014

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“…All the studies included in this meta-analysis evaluated SPV in seated position but used one or more different methodological characteristics in the research design. Some of them used motorized chairs to do the test [ 13 , 21 , 23 , 30 – 33 , 35 ], and others used manual chairs [ 5 , 12 , 22 , 34 , 36 – 38 ]. The speed used to move the chair also varied within the sample.…”

Section: Discussionmentioning

confidence: 99%

“…The speed used to move the chair also varied within the sample. However, the majority of studies adopted a maximum displacement speed of 1.5°/s, which would help to eliminate semicircular canal stimulation, minimizing possible bias [ 5 , 12 , 13 , 30 , 34 – 36 , 39 ].…”

Section: Discussionmentioning

confidence: 99%

“…As a minimum, the restriction of the trunk and legs, as well as the maintenance of head alignment during the test is recommended to guarantee participants’ safety and to avoid postural reactions during the test. Although sensory inputs from trunk, legs and/or shoulders are important in the perception of verticality, even patients with paraplegia or tetraplegia present no directional bias in the orientation of postural vertical in the sitting position [ 1 , 36 , 44 ]. Moreover, this systematic review aimed at investigating the directional bias of postural vertical perception in the sitting position under a method of adjustment.…”

Section: Discussionmentioning

confidence: 99%

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Normative data for human postural vertical: A systematic review and meta-analysis

et al. 2018

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Perception of verticality is required for normal daily function, yet the typical human detection error range has not been well characterized. Vertical misperception has been correlated with poor postural control and functionality in patients after stroke and after vestibular disorders. Until now, all the published studies that assessed Subjective Postural Vertical (SPV) in the seated position used small groups to establish a reference value. However, this sample size does not represent the healthy population for comparison with conditions resulting in pathological vertical. Therefore, the primary objective was to conduct a systematic review with meta-analyses of Subjective Postural Vertical (SPV) data in seated position in healthy adults to establish the reference value with a representative sample. The secondary objective was to investigate the methodological characteristics of different assessment protocols of SPV described in the literature. A systematic literature search was conducted using Medline, EMBASE, and Cochrane libraries. Mean and standard deviation of SPV in frontal and sagittal planes were considered as effect size measures. Sixteen of 129 identified studies met eligibility criteria for our systematic review (n = 337 subjects in the frontal plane; n = 187 subjects in sagittal plane). The meta-analyses measure was estimated using the pooled mean as the estimator and its respective error. Mean reference values were 0.12°±1.49° for the frontal plane and 0.02°±1.82° for the sagittal plane. There was a small variability of the results and this systematic review resulted in representative values for SPV. The critical analysis of the studies and observed homogeneity in the sample suggests that the methodological differences used in the studies did not influence SPV assessment of directional bias in healthy subjects. These data can serve as a reference for clinical studies in disorders of verticality.

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“…Another explanation for the limited effect of GVS on the SPV might be the abundance of somatosensory information. Somatosensory information -if available -is known to be crucial and even sufficient for an accurate SPV estimation [1,14,22]. In our set-up, different tactile information was provided by the Spacecurl's padded restraints around hips and the pressure distribution under the feet.…”

Section: Manipulation Of Subjective Verticalsmentioning

confidence: 99%